平成２６年度
老朽化トンネル補強技術の研究
目 次第１章研 究 の 概 要 ···························································· 11.1 背 景 お よ び 目 的 ·························································· 11.1.1 背 景 ································································ 1
1.1.2 目 的 ································································ 11.2 補 強 方 法 ································································ 21.2.1 現 状 と 課 題 ·························································· 21.2.2 着 眼 点 と 補 強 概 要 ···················································· 21.2.3 補 強 方 法 の 特 徴 ······················································ 31.2.4 補 強 手 順 ···························································· 3
1.2.5 施 工 状 況 概 要 ························································ 41.3 補 強 方 法 の 適 用 範 囲 と 適 用 方 法 ············································ 51.3.1 適 用 範 囲 に つ い て ···················································· 51.3.2 適 用 方 法 に つ い て ···················································· 51.4 研 究 の 進 め 方 ···························································· 71.5 研 究 内 容 と 成 果 概 要 ······················································ 71.5.1 平成 25 年 度 実 施 事 項 概 要 ············································· 71.5.2 平成 26 年 度 実 施 事 項 概 要 ············································ 15第２章

既 設 ト ン ネ ル へ の 適 用 方 法 検 討 （ パ ラ メ ー タ 解 析 ） ······················· 172.1

解 析 条 件 ······························································ 172.1.1 既 設 ト ン ネ ル 設 定 条 件 ··············································· 172.1.2 設 定 荷 重 ··························································· 172.1.3 既 設 ト ン ネ ル の 部 材 仕 様 の 設 定 ······································· 172.1.4 補 強 リ ン グ の 部 材 仕 様 の 設 定 ········································· 222.1.5 解 析 モ デ ル ························································· 252.2解 析 結 果 ······························································ 27

2.3

各 部 応 力 照 査 結 果 ····················································· 72

2.3.1 既 設 ト ン ネ ル の 応 力 照 査 結 果 ········································ 72
2.3.2 補 強 リ ン グ の 応 力 照 査 結 果 ·········································· 74
2.3.3 充 填 材 加 圧 注 入 時 ・ 充 填 材 硬 化 後 残 存 圧 力 作 用 時 の 安 全 性 ·············· 74
2.4

追 加 外 荷 重 作 用 時 の 補 強 効 果 の 検 討 ····································· 88

2.5

ま と め と 課 題 ························································· 89

2.5.1 ま と め ···························································· 89
2.5.2 課 題 ······························································ 89

第３章

設 計 方 法 の 検 討 （ ２ 次 元 フ レ ー ム 解 析 ） ································ 91

3.1

２ 次 元 フ レ ー ム 解 析 の 方 針 ············································· 91

3.2

全 体 系 解 析 条 件 ······················································· 95

3.3

全 体 系 解 析 結 果 ······················································· 97

3.3.1 設 計 荷 重 時 の 比 較 ·················································· 97
3.3.2 付 加 荷 重 時 の 比 較 ·················································· 97
3.4

リ ン グ 間 継 手 部 ······················································· 113

3.4.1 解 析 条 件 ·························································· 113
3.4.2 解 析 結 果 ·························································· 114
3.5

応 力 照 査 の 比 較 ······················································· 115

3.6

２ 次 元 フ レ ー ム 解 析 に よ る 追 加 外 荷 重 作 用 時 の 検 討 ······················· 124

3.6.1 既 設 ト ン ネ ル の 剛 性 低 下 を 考 慮 し た 追 加 外 荷 重 作 用 時 の 荷 重 分 担 率 の 検 討 124
3.6.2 既 設 ト ン ネ ル と 補 強 リ ン グ 間 の 離 隔 発 生 の 検 討 ························ 126
3.7

ま と め と 課 題 ························································· 128

3.7.1 ま と め ···························································· 128
3.7.2 課 題 ······························································ 128
第４章

簡 易 型 ゴ ム チ ュ ー ブ に よ る コ ス ト ダ ウ ン 実 験 検 討 ························ 129

4.1

実 験 計 画 ····························································· 129

4.1.1 簡 易 型 ゴ ム チ ュ ー ブ の 概 要 ·········································· 129
4.1.2 ゴ ム チ ュ ー ブ の 形 状 ················································ 130
4.1.3 実 験 装 置 お よ び 加 水 圧 過 程 ·········································· 132
4.2

実 験 結 果 ····························································· 133

4.2.1 Ｃ Ａ Ｓ Ｅ － １ ······················································ 134
4.2.2 Ｃ Ａ Ｓ Ｅ － ２ -１ ··················································· 135
4.2.3 Ｃ Ａ Ｓ Ｅ － ２ -２ ··················································· 136
4.3

ま と め と 課 題 ························································· 137

4.3.1 ま と め ···························································· 137
4.3.2 課 題 ······························································ 137
第５章

施 工 方 法 の 検 討 ······················································ 139

5.1

施 工 ス テ ッ プ 毎 の 課 題 と 対 処 方 法 ······································· 139

5.2

計 測 計 画 ····························································· 141

5.3

施 工 ・ 維 持 管 理 フ ロ ー ················································· 143

5.4

ま と め と 課 題 ························································· 144

5.4.1 ま と め ······························································ 144
5.4.2 課 題 ································································ 144
第６章

ま と め と 今 後 の 展 開 ·················································· 145

6.1

ま と め ······························································· 145

6.2

今 後 の 展 開 ··························································· 147➨㸯❶ ◊✲ࡢᴫせ  ⫼ ᬒ ࠾ ࡼ ࡧ ┠ ⓗ ⫼ ᬒ ᮏ ◊ ✲ ࡣ ࠊ㒔 ᕷ 㒊 ࡢ ᆅ ୗ ࡟ ᘓ タ ࡉ ࢀ ࡚ ࠸ ࡿ ᆅ ୗ 㕲 ࠊඹ ྠ ⁁ ࢺ ࣥ ࢿ ࣝ ࡜ ࠸ ࡗ ࡓ ෇ ᙧ ࢺ ࣥ ࢿࣝࢆᑐ㇟࡜ࡍࡿࠋࡇ ࢀ ࡽ ࡢ ᑐ ㇟ ࢺ ࣥ ࢿ ࣝ ࡛ ࡣ ࠊ⤒ ᖺ ኚ ໬ ࡟ ࡼ ࡿ ⪁ ᮙ ໬ ࡞ ࡝ ࡀ 㐍 ࢇ ࡛ ࡁ ࡚ ࠾ ࡾ ࠊࡇ ࡢ ≧ ἣ ࡟ᑐᛂࡍ࡭ࡃࠊ≉࡟ࢥࣥࢡ࣮ࣜࢺࡢ๤ⴠ࡟ᑐࡍࡿྛ✀ࡢ⿵ಟᢏ⾡ࡀ㛤Ⓨࡉࢀ࡚ࡁ࡚࠸ࡿࠋࡋ ࠿ ࡋ ࠊ㒔 ᕷ ෌ 㛤 Ⓨ ࡟ ࡼ ࡿ እ Ⲵ 㔜 ኚ ໬ ࡟ క ࠺ そ ᕤ ࢥ ࣥ ࢡ ࣜ ࣮ ࢺ ࡢ ኚ ≧ ࡜ ࠸ ࡗ ࡓ ஦ ᱌ ࡀ ᾋ࠿ࡧୖࡀࡗ࡚ࡁ࡚࠾ࡾࠊୖグࡢ⿵ಟᢏ⾡ࡢࡳ࡛ࡣ༑ศ࡞ᑐᛂࡀᅔ㞴࡜࡞ࡿࠋࡇࡢࡓࡵࠊ⪁ᮙ໬ࢺࣥࢿࣝࡢ⪏ຊࢆቑຍࡉࡏࡿ⿵ᙉᢏ⾡ࡀࠊ㒔ᕷࡢ෌⏕ᢏ⾡࡜ࡋ࡚௒ᚋᚲせ࡞ᢏ⾡࡟࡞ࡗ࡚ࡃࡿࠋࡲ ࡓ ࠊᮾ ᪥ ᮏ ኱ 㟈 ⅏ ࢆ ᩍ カ ࡟ ⪏ 㟈 ⿵ ᙉ ࡢ ࡉ ࡽ ࡞ ࡿ ࢢ ࣞ ࣮ ࢻ ࢔ ࢵ ࣉ ࡀ ᚲ せ ࡜ ࡉ ࢀ ࡚ ࡁ ࡘ ࡘ࠶ࡾࠊࡇࡢࡼ࠺࡞ၥ㢟࡟ᑐࡋ࡚ࡣࠊୖグࡢ⿵ಟᢏ⾡ࡢࡳ࡛ࡣ༑ศ࡞ᑐᛂࡀᅔ㞴࡜࡞ࡿࠋ┠ ⓗ ᮏ◊✲࡛ࡣ⿵ᙉ᪉ἲ࡜ࡋ࡚ࠊ⿵ᙉࡀᚲせ࡞᪤タࢺࣥࢿࣝࡢෆഃ࡟⿵ᙉࣜࣥࢢࢆ⤌❧࡚ࠊ⿵ᙉࣜࣥࢢ࡜᪤タࢺࣥࢿࣝࡢ㛫࡟ᅽຊࢆ᥃ࡅ࡚ࠊ᪤タࢺࣥࢿࣝࢆෆഃ࠿ࡽእഃ࡬ᢲࡍຊࢆ୚࠼ࡿࡇ࡜࡟ࡼࡗ࡚⾜࠺ᢏ⾡࡟╔┠ࡋ࡚⾜࠺ࠋ࡞࠾ࠊ᪤タࢺࣥࢿࣝࡢ⿵ᙉࢆᢸ࠺ࡢࡣ⿵ᙉࣜࣥࢢ࡛࠶ࡾࠊὀධᅽຊ࡟ࡼࡿ⿵ᙉࡢ⛬ᗘࡣࠊ᪤タࢺࣥࢿࣝࡢ≧ἣࢆᢕᥱࡋࡓ࠺࠼࡛ࠊ᪤タࢺࣥࢿࣝࡢᵓ㐀࡟ᨭ㞀ࢆࡁࡓࡉ࡞࠸⠊ᅖෆ࡜ࡍࡿࠋ
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